Clutch



Jne 19; 1928.

O. R. HUMPHREYS ET AL CLUTCH Filed July 23, 1927 2 Sheets-Sheet l c;A AKGUDQ( June 19, 192s.

1,674,013y o. R. HuMPHRl-:Ys ET AL CLUTCH Filed July 25, 1927 2sheets-sheet 2 Patented .lune 19,

OMAR R. EUMEHBEYS AND WALTER G.

.Application led July 23,

fsa l1 t Frein.

CLUTCH.

The present invention relates to clutches, and has particular referenceto double acting clutches.

An object of this invention is to provide a clutch which will operateequally well when the driving' axle is going in either a forward orareverse direction. Y

Another object of this invention is to provide a clutch which willoperate in conjunction withfa brake whereby to release the clutchsimultaneously with the application of the brake.v

' A further object of this invention is to provide means whereby thelocking means .of the clutch will rotate with the clutch.

- A still further object of this invention is tov provide a .clutchwhich is positive in operation and eliminates any possibility ofVVslippage between the drive member and the driven member.

The above and various other objects and advantages of this inventionwill in part be described in and in part be understood from thefollowing detailed description of the present preferred embodiment7 thesame being illustrated in the accompanying drawings, wherein Fig. 1 is adetailed end view of a clutch constructed according to the presentinvention and applied to a 'sprocket which is here partly broken away,and

F ig. 2 is a section view of the same taken substantiallythrough theVcenter thereof.-

Referringto the drawings, and first to Fig. 2, the numeral 1 representsa drive shaft Y from any suitable source of power which has a splinedport-ion 2 at its outer end, as more particularly shown in Fig. 1.- AcircularY wedge block 3. isA adapted to fit upon and register with thesplined end 2'of the shaft 1, and a sleeve or hub 4 is adapted toclosely Y uponthe hub by ineens of f washer? 1.2

1927. Serial No. 207,929.

which may be secured to the splined portion 2 of the shaft 1 by a bolt11 or the like.

A. driving pin 12 is mounted on said wheel 6 and is retained thereon bya nut 13. The pin 12 is preferably provided with a square shank at itsinner end for Vpurposes later described.

The wheel 6 is also provided with a lug V15 which is secured t0 saidwheel by bolts 16 or the like.

A sleeve or hub 17 is adapted to be loosely mounted on the periphery ofthe inner end of the hub 9 and a disc or wheel 13 is secured to theouter end of said hub 17, .said disc 18 being parallel with said wheel 6and at right angles to said shaft 1.

lThe disc l18 is provided with slots 19 and 2O for receivingtherethrough the pin 12 and the lug 15 respectively. in annular flange21 extends inwardly from said disc 1S. The purpose of this flange willbe later described. The disc 18 also provided with a stop lug 22 towhich is secured a guide 23 by means of bolts 24 or the like.

leferringto Fig. 1 a pair of opposed levers 25 and 25 having at theirlower ends heads 26 and 26 respectively which are preferably mounted inspaced relation to each other, are provided with aconnecting block 29 atva point spaced downwardly from the upper end thereof,.and vtheconnecting block 29 is secured to said levers 25 and 25 by means of fapair of fulcrum pins 27 and 2.7 which .may

be locked in place by a Cotter pin .2S or the like. .A second connectinglink or block 29 maybe secured to the levers 25 and 25 at Y the oppositeside of said block 29 and in like manner. A supporting or center piece30, having a bolt 31, is adapted to hold the connecting links 29 and 29in spaced relation to each other.

VThe levers or arms 25 and 25 are provided at their tops with extensions32 and V32 which 'are pivoted at 33 and 33', re-

spectively to a pair of bails 34 and 34', the

bails 34 and 34 being secured to an eXpansible brake band 35 which isopen at the top thereof. The brake band 35 is provided with a brakelining 36 or the like on the periphery thereof, the lining 36 beingsecured to the brake band 35 in any itable manner.

outwardly extending flange 37 the inner surface of which is adapted tocontact with the brake lining 3G when the same is expanded. The hails34tand 34 are provided with suitable angular cutouts 38 and 33/respectively so that the square sha-nk lllof the pin '12 may bt looselymounted therebetween. Itwill-be noted'that when theheads 26 and 2G ofthearms and 25 are moved outwardly the extensions 32 and 32 will movetoward each other thereby drawing or carrying the hails 34 and 34 towardeachother-and thus contracting the clutch band 35, and this contractingmovement or' the clutch 'band will cause the brake lining 36 to drawawayfrom theinside ofthe 'drum or `flange 437. ,A coil spring 39 is securedat opposite ends to said lever arms 25 and 25 'and is adapted tonormally pull the heads 23 and 26"toward each other. It will thus beVnoted Vthat the Vnormal condition `of' the clutch lband 35 iseX'p'andedand that the brake lining 36 will normally engage orgrip saidflange 0T drum y 37.

A brake lever 40 iis pivoted. at 'tlto a suitablel part or member oitthepower mechanism, and a pair of pins 32are mounted on said lever l0 inspaced relation Ato 'each other. An outside brake band 43 "having azbrake lining 44 secured thereto in any suitable manner `has a pairoflooped ends 45 and 45 which are adapted to be mountedcn said pins 42.The lining tisjmounted on -the brake wband 43 .at the inside thereof andis adapted to engage theperiphery of the 4drum 21 when the brake band 43is contracted. 'l`lie.bralre"ban`d *43 is normally 4in spaced relation`to the drum 21 sothat thelinng 44 willnot normallyengage the Adrum'2luntil theiband 43 is contracted*by/movement of thel brake lover 40.Thebanl 43 is provided with a fork detent 46 lwhich is secured theretoin any suitable mannen-anda stationaryxpin 41:7 maybe suitablymounted'on the power mechanism so that'thelbrakeiband 43 willnot-revolve with. said drum 21.

l'n o eration'the power is applied to the drive slla'aft Land as'thedisc E/llhaving the 'drum 37 `mountedthereon locked `on said disc 4 anddrum 37 will lrevolve with the retard themovement thereof. It ofcourseunderstood that with the retarding of the drum'21 the disc 18 is alsolikewise'rtarded, andthe retarding action of the disc 18 causes `thesame ,to draguntilthe stoplug'22engages with eitherhead 26 or`26,'depending upon'the direction of thevmovementv of `the -`drive shaft l.By engagingwiththe heads 26 or 26 the lever arms 25 or 25 are movednormally f expanding -he `further contracted to entirely stop themovementotthe sprocket wheel 6. The ac A tion of applying the brake 43and the release .otithe clutch is practically simultaneous, and

the clutch will stay released until the brake band 43 has been released.

It is of course understood that various changes and Amodifioations maybe made Ain the details of lconstruction and design 'of the abovespecifically described embodiment Aof the invention `without departing'trom the spirit thereof, such vchanges and modificationsbeingrestricted only by the scope 4of the following claims.

What is claimed is: l

1. The ycombination of aclutch "comprising a. 'driving member, a drummountedion said driving,lr lmember Vand adapted 'to turn therewith, adriven member loosely mounted on saiddrum, sa-iddriven member having adrum loosely mounted thereon, locking means on said second drumforcausinglsaid driven ,member to turn `with `said driving member, and abrake, said brake being adapted to engage `said secondfdrum whereby tocause-disengagement Vo'f said locking` means.

C2. A clutch comprising a driving member, a drum mounted on saiddriving,r v-member andbeing adapted to turntherewith, said drum `havinganoutwardly extending hub, a driven member loosely mounted on said hub,a second drum loosely mounted on said driven member, lockingr meansonsaid second drum for locking same l.with said drivingr 'membeig and'retarding means 'adapted to retard vthe movement of said driven memberwhereby to release said locking means.

3. A cliitch comprising 'a driving member, a drum "mounted von saiddriving' member and being adapted to turn itherewith, .an outwardlyextending hubfon `said drum, a 'driven member adapted to rotate on saidhub, a second drum loosely mounted onxsaid ldriven member, locking meanson said isec lond drum for-locking same with saiddriving member,saidlocking means comprising a pair of ipivotally mounted arms, brakemeans `pivoted to said l arms, and :means for said brake :means wherebyto vengage said first drum, :and means for 'contracting `said brakemeans .whereby to disengagesaid 'brakemeans from `said first drum.

4. A clutch comprising a driving member, fa ldrum `n-iounted on saiddriving i member and being adaptedto turntherewith, a

driven member pivoted on said drum, a second drum pivoted on said drivenmember, said second drum being loosely mounted out- Wardly from saidfirst drum, an expanding brake mounted Within said first drum and beingconnected to and being adapted t0 revolve With said second drum, meansfor normally expanding said brake whereby to engage said first drum, andrelease means for contracting said expanding brake and releasing saiddriving member from said l0 driven member.

In testimony whereof, we have axed our signatures.

OMAR R. HUMPHREYS. WALTER G. HUMPHREYS.

